John beret



(No Model.) J. BERRY.

MACHINE FOR GRQOVING NEEDLES.

, Pateinted June 6; 1882.

UNITED STATES PATENT OFFICE.

JOHN BERRY, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE NATIONAL NEEDLE COMPANY, OF SAME PLACE.

MACHINE FOR GROOVING NEEDLES.

SPECIFICATION forming part of Letters Patent. No. 259,262, dated June 6, 1882, Application filed November 7, 1881 (No model.)

the feed-screw at the instant that the groove cuts in the needle should commence, the object being to prevent serious damage to the' feed-screw and nut by permitting the latter to ride upon the former before properly engag ing with it, and to give to the sliding bed such a positive start as to prevent the production of imperfectly-grooved needles.

In the drawings forming part of this specification, Figure 1 is a perspective View, partly in section, of the operative parts of a needlegrooving machine with which the devices which are the subject of this application co-operate, and which embodies said devices. Fig. 2 is a perspective view, partly in section, of parts of said machine embodying my improvements.

In the drawings, A is the frame of the machine. B is the cross-head. D is a cross-head support. a a are cutter-shafts. h is the sliding bed. I) is a cam-shaft. c is a crank. cis the feednut cam. o is the stop-lever cam. n is the stop-lever. tis the stop-pin. o is the feed-screw gear. 8 is the feed-screw. a is the feed-nut. z is the feed-nut frame under bed h. dis the feed-nut lifting-lever. e is the camand-lever-connecting hook. to is a stop-screw on bed h. K is the bedlever. H is the driving-pulley.

Like letters refer to like parts in the different figures.

In the drawings, It indicates the ordinary sliding bed of a needle-grooving machine, upon which are placed the usual clamping devices to hold the needle while being grooved, and which is adapted to be fed along on frame A by the action of the revolving feed-screw s,

ter being a half-nut fitted to slide vertically in frame a, which is attached to bed It up against and away from the under side of the said feed-screw s.

A suitable drivin g-beit is connected with the pulley H, the latter being fixed upon the end of one of the shafts a, which are supported upon the front face of the cross-head B, said shafts being geared one to the other, as shown in Patent No. 184,347, of 1876, and having the usual grooving-cutters secured to their lower ends. A small pulley under pulleyH'provides for running a belt therefrom,in the direction shown by dotted lines, Fig. 1, onto pulley E on the end of a vertical shaft, a, on the lower end of which is a beveled pinion,which engages with and gives a rotary motion to gear 2:,wl1ich is secured to the rear end of the feed-screw s.

A nut-frame, z, is secured to the under side of the bed h, in which the half-nut a: is held and guided.

To the end of an arm on frame 2 is pivoted a lever, d, which, when its free end is lifted,

carries a pin, 21', against the under side of nut 00, forcing the latter into engagement with the feed-screw s, and when the free end of lever d is depressed nut a: drops away from said feed-screw, leaving the bed free to be moved on frame Aby the hand-lever K.

. An arm, a, is secured to the front end of the 'bed h, and said arm carries an: adjusting or stop screw,'w, whose endis adapted to strike the end of frame A when said bed is moved backward to a certain position and stop the bed at that point. l

A shaft, b, is supported on the rear side of the cross-head B, to one end of which is secured the cam e, a crank, o, secured to said shaft serving to turn it. I

A cam-hook, c, is supported in a vertical position by the side of the machine, whose upper end is of hook shape and projects over cam e, and to its lower end is secured a slotted block, d in which the end of lever d engages. Aspriu g,c aids to throw the end of lever dand book 0 down. A second cam, o, is fixed on the cross-shaft b, and againstits face the end of a stop-lever, a, bears, driven that way by a spring, m. Said stop-lever is supported in the position shown upon screws or pins, which pass turned by gear v upon the feed-nut or, the lat- I through slots in it into frameAat one end'and V I into one of the cross-head supports D, which is shown in dotted lines in Fig. 1. The end of said lever n over the periphery of the gearwheel c has ashortarm thereon hanging downward and just clearing said wheel.

The periphery of the gear-wheel o is pro-- vided with perforations 11 into one of which the stop-pin i is placed. The revolution of the said gear-wheel when the machine is in operation is in the direction indicated by the arrow thereon, and the rotation of the feed screw thereby effected moves the bed It forward or away from wheel 1; to give the needle which may be clamped on said bed the proper motion between the groove-cutters, and at the end of the groove-cut in the needle the movement of said bed is caused, by mechanism described in said patent, to turn shaft 1) suffieiently to carry cam e from under the hooked end of the cam-hook c letting the latter and the end of lever d drop and disengage nut w from the feed-screw 8, thereby stopping bed h. In ordinary needle-grooving machines the bed his at this stage of the work, or when a needle is to be put in the machine to be grooved, moved back upon frame A, carrying nut or with it and bringing the latter to a startingpoint under the feed-screw 8 without regard to the coincident positions of the screwed portions of the nut and feed-screw, and therefore when said nut is lifted, as above described, to engage with screw s said nut often fails to engage with the screw until the latter has been revolved more or less while the nut was forced against it, thereby damaging the screwed portions of both of said parts and failing to impart a positive forward movement at once to the bed and the work carried by it, the result of the latter being to cause the grooves in the needle to be so imperfectly cut as to cause considerable loss. The bed his moved back as aforesaid each time to the same startin g-poin t, the latter being determined by the position of the stop-screw to, which is attached to the bed by arm 0 In order to obviate the above-named inconveniences and objections incident to ordinary needle-grooving machines, it is necessary that provision be made for stopping the feed-screw before the nut w is lifted against it at such a point in its rotary motion as will cause the screw-threads on one to be stopped in such a position that they will be coincident with the grooves between the threads of the other, so that when the nut is lifted against the feedscrew 8 it will at once engage with its screwthread, and obstruction to the rotation of the feed-screw be at the same instant removed, so that the bed h may at once he started and the needle to be grooved be properly moved between the cutters on shafts a a.

The above-named improvements are eflected by the devices described below.

The feed-screw is rotated carefully by wheel 22 to such a point as causes such a coinciding of screw-threads and grooves on said feedscrew and the notes as causes the latter to perfectly engage with the former when lifted, as aforesaid, to start the bed It forward. A stop-pin, t, is then fixed in the periphery of wheel 12 at or nearly on the upper side of it,

as shown, so that when the short downhangin g arm on lever it stands before said pin wheel 4: will be stopped. Said lever n is pressed toward cam 0 on shaft 11 by spring m, so that one end thereof is constantly held against said cam. Said cam 0 is so set on shaft 1) that its highest part will bear against the end of lever 11. and move the short arm of the latter so far toward the face of wheel 2: as to be out of the way of pin t while the cam 0 (also on shaft b) is under the hook c and holding nutw against feed-screw s but when shaft b is turned to carry cam e from under the hook 0 so that nut :r drops away from the feed-screw, the end of lever n will remain upon the highest part of said cam until crank c is turned forward by the operator for another movement, and will then ride upon the lowest part of cam 0, drawing the short arm on said lever before pin 1' and stopping wheel a and the feed-screw. The bed It may now be moved back to its starting point again, and in turning shaft b to engage nut .r with the feed-screw the latter will be in proper position to let the nut freely engage in its screw, as aforesaid, and by the same movement of said shaft 1) the highest part of cam 0 moves lever n endwise and carries the short arm thereon away from pin 2', letting wheel c revolve again. While the rotation of wheel o is arrested by lever n, as aforesaid, the continued rotation of pulley H is not interfered with, but the belt which runs from a pulley under the latter is put on somewhat loosely and slips on pulley E, while wheel '0 is held by the lever n so that it cannot rotate.

What I claim as my invention is- 1. In a machine for grooving needles, the combination, with the sliding bed thereof, the feed-screw actuating said bed, and the feednut w, of appliances, substantially as described, for supporting and lifting said feed-nut under said bed, the wheel '0, connected to said feedscrew and provided with a stop-pin in its periphery, the cam-shaft b, cam 0, lever n, and a suitable spring to force the end of said lever against said cam, all as set forth.

2. The combination, with the wheel 1 connected to the feed-screw s and having the stop-pin t therein, of the stop-lever a, spring m, cam 0, and shaft 11, substantially as set forth.

3. The combination, with the feed-screw s and nut .70, of lever d, book a, shaft 1), cams a and 0, lever a, spring at, and wheel '0, having the stop-pin i therein, substantially as set forth.

JOHN BERRY. Witnesses:

H. A. CHAPIN, H. E. WILKINs. 

